Amsoil ATF in 4R100 - Ford Powerstroke Diesel Forum
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Old 03-27-2012, 07:22 AM
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Amsoil ATF in 4R100

Just got my 6.0 trans cooler in the mail and Im planning on doing a complete trans fluid flush along with the install. Im a fan of Amsoil products and I want to fill it with the Amsoil Multi-Vehicle ATF, but I've read that multi-use ATF's that are designated for both Mercon and Mercon V are a big no no in our trans. Anyone with experience on this matter? Thanks.
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Old 03-27-2012, 05:58 PM
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Bump...anyone? I did some more research; Amsoil, Schaeffers, Mobil 1, Royal Purple - all of their synthetic ATFs are compatible with both Mercon and Mercon V...I wouldn't think that all of these respected lubricant manufacturers would produce a fluid that shouldn't be used in the 4R100. Looks like the Amsoil will be safe to use. Still would like to hear any opinions.
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Old 03-27-2012, 06:01 PM
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I'd use it.
Specifically Mercon V I wouldn't.
Basically, it works like this.
DexII was the old stuff.
DexxIII will work for DexIII and anything older than it.
DexIV is good for III and IV.
And so on.
That's kind of how it's supposed to work.
Synthetics like Mobil 1, Amsoil, RP, etc., are the "top of the line" or pyramid, so to say, so they will bascially work in place of any fluid.
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Old 03-27-2012, 07:54 PM
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I recently flushed my trans and had Mobil 1 ATF put in. Been about 1000 pretty hard miles since and zero problems. Instantly noticed the trans shifting smoother but unfortunately I don't have gauges yet so I couldn't give you in exact temp differences if that is what you are looking for. I'm sure it is running a bit cooler now thought with the full synthetic.
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Old 03-27-2012, 10:46 PM
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AmSoil for 50K with Dieselsite filter. Very very clean yet.
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Old 03-28-2012, 12:44 AM
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Its all I use in all of my vehicles... But I'm also a dealer also. Let me know if you need a discount.
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Old 03-28-2012, 05:27 AM
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Quote:
Originally Posted by E-Man View Post
Just got my 6.0 trans cooler in the mail and Im planning on doing a complete trans fluid flush along with the install. Im a fan of Amsoil products and I want to fill it with the Amsoil Multi-Vehicle ATF, but I've read that multi-use ATF's that are designated for both Mercon and Mercon V are a big no no in our trans. Anyone with experience on this matter? Thanks.
Run it, it is a good fluid. BTS recommends schaffer's for their trans it meets Mercon V as well. Both good fluids, since they are synthetics with high oxidation resistance and most likely have slightly more friction modifiers so they meet Mercon V specs. Note Amsoil says the fluid recommend for Mercon V, not approved so they polly don't have ford's total blessing. Regardless the 4R100 isn't that picky about fluid, I would run amsoil with confidence.
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Old 03-28-2012, 08:02 AM
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Hi primetime1267:

Would you mind tell me yours mileage before and after 6" lifter and 37" tires? It's to noise on hwy? I really like that set up...
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Old 03-28-2012, 09:48 AM
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I planned on running the Amsoil too. Is everyone doing a full "flush" or just draining the pan and refilling it. I've heard of problems with a full flush, to the point that a few trans shops around here won't do anything more than drop the pan, change the filter, new gasket and refill.
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Old 03-28-2012, 10:15 AM
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Quote:
Originally Posted by Tj Krawler View Post
I planned on running the Amsoil too. Is everyone doing a full "flush" or just draining the pan and refilling it. I've heard of problems with a full flush, to the point that a few trans shops around here won't do anything more than drop the pan, change the filter, new gasket and refill.
Im going to do a full flush at my local Ford dealer. They said I can bring them the Amsoil and they will charge me just the labor price of the flush, plus filter. I did a full flush on my 99 F-250 and had no issues afterward.

From what the Ford tech explained to me, flushing can lead to issues with the clutch packs if they are already worn. Supposedly if this is the case, removing the old fluid will make the problems more noticeable. Im not too knowledgable with transmissions, thats just what I was told by the tech. I guess it's like playing rush and roulette when you flush, but the fluid already in my truck doesn't look that great and I want to replace it.
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